Late 18th century; earliest use found in Francis Gladwin (?1745–1812), Persian scholar. From Islam + -ite, perhaps originally after French islamite Muslim.
Definition of Islamite in US English:
Islamite
nounˈɪzləmʌɪt
Muslim.
adjectiveˈɪzləmʌɪt
Muslim.
Origin
Late 18th century; earliest use found in Francis Gladwin (?1745–1812), Persian scholar. From Islam + -ite, perhaps originally after French islamite Muslim.